/**
* Adds the specified layer at the end of the list
*
* @param layer a {@link Layer}
*/
public void addLast(Layer<?> layer) {
int indexAdded = layers.size();
layers.add(layer);
ListDataEvent event =
new ListDataEvent(this, ListDataEvent.INTERVAL_ADDED, indexAdded, indexAdded);
notifyListeners(event);
}
@Override
public void clear() {
int lastIndex = layers.size() - 1;
layers.clear();
ListDataEvent event = new ListDataEvent(this, ListDataEvent.INTERVAL_REMOVED, 0, lastIndex);
notifyListeners(event);
}
/**
* Adds the specified layer at the beginning of the list because layers are stacked. They are also
* painted in reverse order
*
* @param layer a {@link Layer}
* @return true
*/
@Override
public boolean add(Layer<?> layer) {
int indexAdded = layers.size();
layers.addFirst(layer);
ListDataEvent event = new ListDataEvent(this, ListDataEvent.CONTENTS_CHANGED, 0, indexAdded);
notifyListeners(event);
return true;
}
@Override
public boolean addAll(Collection<? extends Layer<?>> layers) {
int indexFirstAdded = this.layers.size();
int indexLastAdded = indexFirstAdded + layers.size();
boolean listChanged = this.layers.addAll(layers);
if (listChanged) {
ListDataEvent event =
new ListDataEvent(this, ListDataEvent.INTERVAL_ADDED, indexFirstAdded, indexLastAdded);
notifyListeners(event);
}
return listChanged;
}
@Override
public boolean retainAll(Collection<?> c) {
int sizeBeforeChanges = layers.size();
boolean listChanged = layers.retainAll(c);
if (listChanged) {
ListDataEvent event =
new ListDataEvent(this, ListDataEvent.CONTENTS_CHANGED, 0, sizeBeforeChanges - 1);
notifyListeners(event);
return true;
} else {
return false;
}
}
@Override
public boolean remove(Object o) {
int indexRemoved = layers.indexOf(o);
if (indexRemoved != -1) {
layers.remove(o);
ListDataEvent event =
new ListDataEvent(this, ListDataEvent.INTERVAL_REMOVED, indexRemoved, indexRemoved);
notifyListeners(event);
return true;
} else {
return false;
}
}
